.about {
    overflow: hidden;
}

.about .list {
    width: 100%;
    height: 251px;
    margin-top: 58px;
    margin-bottom: 50px;
}

.about .list .list-item {
    float: left;
    width: 350px;
    height: 193px;
    margin-right: 75px;
}

.about .list .list-item:last-child {
    margin-right: 0;
}

.about .list-item-t {
    color: #555555;
    font-size: 24px;
    font-weight: bolder;
    line-height: 38px;
    text-indent: 50px;
    margin-bottom: 30px;
}

.about .list-item-p {
    color: #555555;
    font-size: 15px;
    line-height: 26px;
}

.about #allmap {
    width: 100%;
    height: 383px;
    margin-bottom: 135px;
}


/* 响应式 */

@media screen and (max-width:768px) {
    .about {
        overflow: hidden;
    }
    .about .list {
        width: 100%;
        height: auto;
        margin-top: 58px;
        margin-bottom: 50px;
    }
    .about .list .list-item {
        float: none;
        width: 90%;
        height: auto;
        margin-right: 0;
        margin: 0 auto;
        margin-bottom: 75px;
    }
    .about .list .list-item:last-child {
        margin-left: 0;
        margin: 0 auto;
    }
    .about .list-item-t {
        text-align: center;
        text-indent: 0;
    }
}